Orthotomicus laricis

Orthotomicus laricis produces two generations annually. Adults of the first generation begin to fly in May, while the second generation appears from late July to early August. It is a polygamous species. After mating, females construct short egg galleries and lay clusters of around 50 eggs on one or both sides of the gallery. Larvae initially feed communally, then in individual galleries that often cross each other. Pupation occurs in the bark. Adults of the second generation overwinter. The species mainly attacks weakened trees, and it can infest stored timber. It prefers 30–100-year-old stands with thick bark and is widely distributed across Europe and Asia.